Burglar-alarm



(No Model.)

w. B. CLARKE.

BURGLAR ALARM.

' No. 350,118. Patented Oct 5, 1886.

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Wllzeww. 56% H -I ha nuk UNITED STATES PATENT OFFICE.

'WILLIAM BAKER CLARKE, OF FRENCH LICK, INDIANA.

BURGLA- R-ALARM.

SPECIFICATION forming part. of Letters Patent No, 350,118, dated October 5, 1886.

Application filed March 11,1866. Serial No. 194,813. (No model.)

To (LZZ whom it may concern:

Be it known that I, XVIL'L'IAM BAKER CLARKE, a citizen of the United States, residing at French Lick, in the county of Orange and State of Indiana, have invented certain new and useful Improvements in Burglar- Alarms; and I do declare the following to be a full, clear, and exact description of the in vention, such as will enable others skilled in the art to which it appertains to make and use the same, reference. being'had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

The special object of the invention is to set a trap for burglars, which will instantly ring a bell or fire off a gun, pistol, or other firearm as soon as they attempt to pass over it.

Figure 1 of the drawings is a. perspective view showing my burglar-alarm set for automatic operation, and Fig. 2 is a side elevation.

In the drawings, A represents the baseplate upon which all the parts are arranged.

Bis the fall, made of wire, pivoted in the cyebolts O C, and provided with the coilspring, which has a constant tendency to throw it fiat on the base-plate.

D is a lever fulcrumed between the top bifurcations c e of the screw-post E.

F is an end-bent bar, which may be made to catch at bottom on a right-angled staple, G, while at the top it holds one end of the lever D, so that the other end may maintain the fall in an erect position against the tension of spring H. The end-bent bar F is provided with an eye, f, on its back and preferably near its middle, so that it may be connected by the wires I with the fixed pins J, which. are curved over at the top.

K represents fire-arms, which are trunnioned in supports L, so that the end carrying the load and the cap, or other means of exploding the powder, may be in the line of travel of the I hammer. The latter is on one end ofa leverhandle, N, which is fulerumed in studs n a. A cartridge and needle maybe used, as shown in Fig. 2 of the drawings, and is preferable. The plate is arranged so that the end A will be where the burglar will probably or neces sarily step when he enters the house. As soon as he touches one of the wires 1', the fall will be thrown with force on the helves or handles N of the hammers, when an explosion will lars are on the premises.

If desired, the guns may be loaded with ball and arranged with respect to the end Acfthe plate so as to shoot the robbers. IVhere used in barns, chiekeirhouses, or other outbuildings, this may be done without the ob jection, in the house, that it is calculated to injure and deface the walls.

\Vhat I desire to protect by Letters Patent isthe base-plate A, the fall B, pivoted at C, the post E, having bifurcations e e, the bar F, bent atff, the right-angled staples G, and the spring H, whereby the trap may be set, as described.

2. In a burglar-alarm, the combination, with the bar F, having the eyef on its back, and connected with mechanism, substantially as described, of the wires I and fixed pins J, curved at the top, whereby the trap may be sprung, as described.

The combination, with a trap. substantially as described, of the fire-arms K, truir nioned in supports L, and the lever N, pivoted at 01, whereby a needle may be made to pierce a cartridge, as specified.

In testimony whereof I a'l'lix my signature. in presence of two witnesses.

\VILLIAM BAKER CLARKE.

\Vi t n esses:

F. A. LEFFLER, N. P. LAMBDIN.

take place, warning the household that lung 1. In burglar-alarms, the combination of 

